package com.ship.system.service.impl;

import java.util.*;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.ship.system.api.domain.SysUserNew;
import com.ship.system.domain.SysDeptMenu;
import com.ship.system.domain.SysUserDept;
import com.ship.system.mapper.*;
import com.ship.system.service.ISysDeptMenuService;
import com.ship.system.service.ISysUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ship.common.core.constant.UserConstants;
import com.ship.common.core.exception.ServiceException;
import com.ship.common.core.text.Convert;
import com.ship.common.core.utils.SpringUtils;
import com.ship.common.core.utils.StringUtils;
import com.ship.common.datascope.annotation.DataScope;
import com.ship.common.security.utils.SecurityUtils;
import com.ship.system.api.domain.SysDept;
import com.ship.system.api.domain.SysRole;
import com.ship.system.api.domain.SysUser;
import com.ship.system.domain.vo.TreeSelect;
import com.ship.system.service.ISysDeptService;
import org.springframework.transaction.annotation.Transactional;

/**
 * 部门管理 服务实现
 * 
 * @author zhangyh
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService
{
    @Autowired
    private SysDeptMapper deptMapper;

    @Autowired
    private SysUserMapper sysUserMapper;

    @Autowired
    private SysUserDeptMapper userDeptMapper;

    @Autowired
    private SysRoleMapper roleMapper;

    @Autowired
    private ISysDeptMenuService deptMenuService;

    /**
     * 查询部门管理数据
     * 
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept)
    {
        return deptMapper.selectDeptList(dept);
    }

    /**
     * 查询部门树结构信息
     * 
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept)
    {
        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     * 
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts)
    {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<Long> tempList = depts.stream().map(SysDept::getDeptId).collect(Collectors.toList());
        for (SysDept dept : depts)
        {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId()))
            {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty())
        {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     * 
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts)
    {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     * 
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Long> selectDeptListByRoleId(Long roleId)
    {
        SysRole role = roleMapper.selectRoleById(roleId);
        return deptMapper.selectDeptListByRoleId(roleId, role.isDeptCheckStrictly());
    }

    /**
     * 根据部门ID查询信息
     * 
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId)
    {
        SysDept sysDept = deptMapper.selectDeptById(deptId);
        List<SysDeptMenu> deptMenus = deptMenuService.getBaseMapper().selectList(
                new LambdaQueryWrapper<SysDeptMenu>()
                .eq(SysDeptMenu::getDeptId,deptId)
        );
        if(deptMenus.size() > 0){
            sysDept.setMenuList(deptMenus.stream().map(SysDeptMenu::getMenuId).collect(Collectors.toList()));
        }
        return sysDept;
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     * 
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    public int selectNormalChildrenDeptById(Long deptId)
    {
        return deptMapper.selectNormalChildrenDeptById(deptId);
    }

    /**
     * 是否存在子节点
     * 
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId)
    {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0;
    }

    /**
     * 查询部门是否存在用户
     * 
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId)
    {
        int result = deptMapper.checkDeptExistUser(deptId);
        return result > 0;
    }

    /**
     * 校验部门名称是否唯一
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept)
    {
        Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue())
        {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 校验部门是否有数据权限
     * 
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(Long deptId)
    {
        if (!SysUser.isAdmin(SecurityUtils.getUserId()))
        {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            if (StringUtils.isEmpty(depts))
            {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 新增保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    @Transactional
    public int insertDept(SysDept dept)
    {
        SysDept info = deptMapper.selectDeptById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus()))
        {
            throw new ServiceException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        int result = deptMapper.insertDept(dept);

        if(dept.getMenuList() != null && dept.getMenuList().size() > 0){
            //增加部门权限关联
            this.insertDeptAuthMenu(dept.getDeptId(),dept.getMenuList());
        }
        return result;
    }

    /**
     * 修改保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    @Transactional
    public int updateDept(SysDept dept)
    {
        SysDept newParentDept = deptMapper.selectDeptById(dept.getParentId());
        SysDept oldDept = deptMapper.selectDeptById(dept.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept))
        {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.updateDept(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors()))
        {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        if(dept.getMenuList() != null && dept.getMenuList().size() > 0){
            //增加部门权限关联
            this.insertDeptAuthMenu(dept.getDeptId(),dept.getMenuList());
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     * 
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept)
    {
        String ancestors = dept.getAncestors();
        Long[] deptIds = Convert.toLongArray(ancestors);
        deptMapper.updateDeptStatusNormal(deptIds);
    }

    /**
     * 修改子元素关系
     * 
     * @param deptId 被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors)
    {
        List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
        for (SysDept child : children)
        {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (children.size() > 0)
        {
            deptMapper.updateDeptChildren(children);
        }
    }

    /**
     * 删除部门管理信息
     * 
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    @Transactional
    public int deleteDeptById(Long deptId)
    {
        SysDept sysDept = deptMapper.selectDeptById(deptId);
        if(sysDept == null){
            return 0;
        }
        List<Long> deptIds = new LinkedList<>();
        //获取当前部门及其子部门信息
        List<SysDept> deptList = deptMapper.selectChildrenDeptById(deptId);
        if(deptList.size() != 0){
            deptIds = deptList.stream().map(SysDept::getDeptId).collect(Collectors.toList());
        }
        deptIds.add(deptId);

        //删除所有部门信息
        deptMapper.deleteDeptByBatchId(deptIds);

        //删除用户岗位绑定关系
        userDeptMapper.delete(
                new LambdaQueryWrapper<SysUserDept>()
                .in(SysUserDept::getDeptId,deptIds)
        );

        //将旗下所有用户归属到父部门
        sysUserMapper.updateUserDeptIdBatch(sysDept.getParentId(),deptIds);

        return deptList.size();
    }

    @Override
    public void insertDeptAuthMenu(Long deptId, List<Long> menuIds) {
        //删除原始数据
        deptMenuService.getBaseMapper().delete(
                new LambdaQueryWrapper<SysDeptMenu>()
                .eq(SysDeptMenu::getDeptId,deptId)
        );
        //新增
        List<SysDeptMenu> deptMenus = new LinkedList<>();
        for (Long menuId : menuIds) {
            SysDeptMenu deptMenu = new SysDeptMenu();
            deptMenu.setMenuId(menuId);
            deptMenu.setDeptId(deptId);
            deptMenus.add(deptMenu);
        }
        if(deptMenus.size() > 0){
            deptMenuService.saveBatch(deptMenus);
        }
    }

    @Override
    public void resetUserPostInfo(SysUser userNew) {
        if(userNew.getDeptId() != null){
            SysDept deptInfo = deptMapper.selectDeptById(userNew.getDeptId());
            if(deptInfo != null){
                userNew.setDeptName(deptInfo.getDeptName());
            }
        }

        List<SysUserDept> userDept = userDeptMapper.selectList(
                new LambdaQueryWrapper<SysUserDept>()
                        .eq(SysUserDept::getUserId,userNew.getUserId())
        );
        if(userDept.size() == 0){
            userNew.setPostName("");
            return;
        }
        List<SysDept> relationDept = deptMapper.selectList(
                new LambdaQueryWrapper<SysDept>()
                        .in(SysDept::getDeptId,userDept.stream().map(SysUserDept::getDeptId).collect(Collectors.toList()))
        );
        if(relationDept.size() == 0){
            userNew.setPostName("");
            return;
        }
        String postName = relationDept.stream()
                .map(SysDept::getDeptName)
                .distinct()
                .collect(Collectors.joining(","));
        userNew.setPostName(postName);
    }

    @Override
    public void resetUserPostInfo(SysUserNew userNew) {
        if(userNew.getDeptId() != null){
            SysDept deptInfo = deptMapper.selectDeptById(userNew.getDeptId());
            if(deptInfo != null){
                userNew.setDeptName(deptInfo.getDeptName());
            }
        }

        List<SysUserDept> userDept = userDeptMapper.selectList(
                new LambdaQueryWrapper<SysUserDept>()
                .eq(SysUserDept::getUserId,userNew.getUserId())
        );
        if(userDept.size() == 0){
            userNew.setPostName("");
            return;
        }
        List<SysDept> relationDept = deptMapper.selectList(
                new LambdaQueryWrapper<SysDept>()
                .in(SysDept::getDeptId,userDept.stream().map(SysUserDept::getDeptId).collect(Collectors.toList()))
        );
        if(relationDept.size() == 0){
            userNew.setPostName("");
            return;
        }
        String postName = relationDept.stream()
                .map(SysDept::getDeptName)
                .distinct()
                .collect(Collectors.joining(","));
        userNew.setPostName(postName);
    }

    @Override
    public List<SysDept> selectDeptAndChildList(Long deptId) {
        List<SysDept> deptList = deptMapper.selectList(
                new LambdaQueryWrapper<SysDept>()
                .like(SysDept::getAncestors,","+deptId)
                .or().eq(SysDept::getDeptId,deptId)
        );
        return deptList;
    }

    @Override
    public List<Long> getParentIdList(List<Long> posts) {
        List<SysDept> deptList = deptMapper.selectList(
                new LambdaQueryWrapper<SysDept>()
                        .in(SysDept::getDeptId,posts)
        );
        if(deptList.size() > 0){
            return deptList.stream().map(SysDept::getParentId).collect(Collectors.toList());
        }
        return new LinkedList<>();
    }

    @Override
    public List<SysDept> selectPostListByUserId(Long userId) {
        List<SysDept> sysDeptList = deptMapper.selectPostListByUserId(userId);
        return sysDeptList;
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t)
    {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList)
        {
            if (hasChild(list, tChild))
            {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t)
    {
        List<SysDept> tlist = new ArrayList<SysDept>();
        Iterator<SysDept> it = list.iterator();
        while (it.hasNext())
        {
            SysDept n = (SysDept) it.next();
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue())
            {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t)
    {
        return getChildList(list, t).size() > 0 ? true : false;
    }
}
